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Contract Name:
SmartWalletImplementation
Compiler Version
v0.7.6+commit.7338295f
Optimization Enabled:
Yes with 780 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.7.6; pragma abicoder v2; import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol"; import "@openzeppelin/contracts/utils/EnumerableSet.sol"; import "@kyber.network/utils-sc/contracts/IERC20Ext.sol"; import "./interfaces/ISmartWalletImplementation.sol"; import "./SmartWalletStorage.sol"; import "./swap/ISwap.sol"; import "./lending/ILending.sol"; contract SmartWalletImplementation is SmartWalletStorage, ISmartWalletImplementation { using SafeERC20 for IERC20Ext; using SafeMath for uint256; using EnumerableSet for EnumerableSet.AddressSet; event ApprovedAllowances(IERC20Ext[] tokens, address[] spenders, bool isReset); event ClaimedPlatformFees(address[] wallets, IERC20Ext[] tokens, address claimer); constructor(address _admin) SmartWalletStorage(_admin) {} receive() external payable {} /// Claim fee to platform wallets function claimPlatformFees(address[] calldata platformWallets, IERC20Ext[] calldata tokens) external override nonReentrant { for (uint256 i = 0; i < platformWallets.length; i++) { for (uint256 j = 0; j < tokens.length; j++) { uint256 fee = platformWalletFees[platformWallets[i]][tokens[j]]; if (fee > 1) { // fee set to 1 to avoid the SSTORE initial gas cost platformWalletFees[platformWallets[i]][tokens[j]] = 1; transferToken(payable(platformWallets[i]), tokens[j], fee - 1); } } } emit ClaimedPlatformFees(platformWallets, tokens, msg.sender); } /// @dev approve/unapprove LPs usage on the particular tokens function approveAllowances( IERC20Ext[] calldata tokens, address[] calldata spenders, bool isReset ) external onlyAdmin { uint256 allowance = isReset ? 0 : MAX_ALLOWANCE; for (uint256 i = 0; i < tokens.length; i++) { for (uint256 j = 0; j < spenders.length; j++) { tokens[i].safeApprove(spenders[j], allowance); } getSetDecimals(tokens[i]); } emit ApprovedAllowances(tokens, spenders, isReset); } /// @dev get expected return including the fee /// @return destAmount expected dest amount /// @return expectedRate expected swap rate function getExpectedReturn( ISmartWalletImplementation.GetExpectedReturnParams calldata params ) external view override returns (uint256 destAmount, uint256 expectedRate) { if (params.feeBps >= BPS) return (0, 0); // platform fee is too high uint256 actualSrc = (params.feeMode == FeeMode.FROM_SOURCE) ? params.srcAmount * (BPS - params.feeBps) / BPS : params.srcAmount; destAmount = ISwap(params.swapContract).getExpectedReturn( ISwap.GetExpectedReturnParams({ srcAmount: actualSrc, tradePath: params.tradePath, feeBps: params.feeMode == FeeMode.BY_PROTOCOL ? params.feeBps : 0, extraArgs: params.extraArgs }) ); if (params.feeMode == FeeMode.FROM_DEST) { destAmount = destAmount * (BPS - params.feeBps) / BPS; } expectedRate = calcRateFromQty( params.srcAmount, destAmount, getDecimals(IERC20Ext(params.tradePath[0])), getDecimals(IERC20Ext(params.tradePath[params.tradePath.length - 1])) ); } /// @dev get expected in amount including the fee /// @return srcAmount expected aource amount /// @return expectedRate expected swap rate function getExpectedIn( ISmartWalletImplementation.GetExpectedInParams calldata params ) external view override returns (uint256 srcAmount, uint256 expectedRate) { if (params.feeBps >= BPS) return (0, 0); // platform fee is too high uint256 actualDest = (params.feeMode == FeeMode.FROM_DEST) ? params.destAmount * (BPS + params.feeBps) / BPS : params.destAmount; srcAmount = ISwap(params.swapContract).getExpectedIn( ISwap.GetExpectedInParams({ destAmount: actualDest, tradePath: params.tradePath, feeBps: params.feeMode == FeeMode.BY_PROTOCOL ? params.feeBps : 0, extraArgs: params.extraArgs }) ); if (params.feeMode == FeeMode.FROM_SOURCE) { srcAmount = srcAmount * (BPS + params.feeBps) / BPS; } expectedRate = calcRateFromQty( srcAmount, params.destAmount, getDecimals(IERC20Ext(params.tradePath[0])), getDecimals(IERC20Ext(params.tradePath[params.tradePath.length - 1])) ); } /// @dev swap using particular swap contract /// @return destAmount actual dest amount function swap( ISmartWalletImplementation.SwapParams calldata params ) external payable override nonReentrant returns (uint256 destAmount) { destAmount = swapInternal( params.swapContract, params.srcAmount, params.minDestAmount, params.tradePath, msg.sender, params.feeMode, params.feeBps, params.platformWallet, params.extraArgs ); emit Swap( msg.sender, params.swapContract, params.tradePath, params.srcAmount, destAmount, params.feeMode, params.feeBps, params.platformWallet ); } /// @dev swap then deposit to platform /// if tradePath has only 1 token, don't need to do swap /// @return destAmount actual dest amount function swapAndDeposit( ISmartWalletImplementation.SwapAndDepositParams calldata params ) external payable override nonReentrant returns (uint256 destAmount) { require(params.tradePath.length >= 1, "invalid tradePath"); require(supportedLendings.contains(params.lendingContract), "unsupported lending"); if (params.tradePath.length == 1) { // just collect src token, no need to swap validateSourceAmount(params.tradePath[0], params.srcAmount); destAmount = safeTransferWithFee( msg.sender, params.lendingContract, params.tradePath[0], params.srcAmount, // Not taking lending fee 0, params.platformWallet ); } else { destAmount = swapInternal( params.swapContract, params.srcAmount, params.minDestAmount, params.tradePath, params.lendingContract, params.feeMode, params.feeBps, params.platformWallet, params.extraArgs ); } // eth or token already transferred to the address ILending(params.lendingContract).depositTo( msg.sender, IERC20Ext(params.tradePath[params.tradePath.length - 1]), destAmount ); emit SwapAndDeposit( msg.sender, params.swapContract, params.lendingContract, params.tradePath, params.srcAmount, destAmount, params.feeMode, params.feeBps, params.platformWallet ); } /// @dev withdraw token from Lending platforms (AAVE, COMPOUND) /// @return returnedAmount returns the amount withdrawn to the user function withdrawFromLendingPlatform( ISmartWalletImplementation.WithdrawFromLendingPlatformParams calldata params ) external override nonReentrant returns (uint256 returnedAmount) { require(supportedLendings.contains(params.lendingContract), "unsupported lending"); IERC20Ext lendingToken = IERC20Ext(ILending(params.lendingContract).getLendingToken(params.token)); require(lendingToken != IERC20Ext(0), "unsupported token"); // AAVE aToken's transfer logic could have rounding errors uint256 tokenBalanceBefore = lendingToken.balanceOf(params.lendingContract); lendingToken.safeTransferFrom(msg.sender, params.lendingContract, params.amount); uint256 tokenBalanceAfter = lendingToken.balanceOf(params.lendingContract); returnedAmount = ILending(params.lendingContract).withdrawFrom( msg.sender, params.token, tokenBalanceAfter.sub(tokenBalanceBefore), params.minReturn ); require(returnedAmount >= params.minReturn, "low returned amount"); emit WithdrawFromLending( msg.sender, params.lendingContract, params.token, params.amount, params.minReturn, returnedAmount ); } /// @dev swap and repay borrow for sender function swapAndRepay( ISmartWalletImplementation.SwapAndRepayParams calldata params ) external payable override nonReentrant returns (uint256 destAmount) { require(params.tradePath.length >= 1, "invalid tradePath"); require(supportedLendings.contains(params.lendingContract), "unsupported lending"); // use user debt value if debt is <= payAmount // user can pay all debt by putting really high payAmount as param uint256 debt = ILending(params.lendingContract).getUserDebtCurrent(params.tradePath[params.tradePath.length - 1], msg.sender); uint256 actualPayAmount = debt >= params.payAmount ? params.payAmount : debt; if (params.tradePath.length == 1) { // just collect src token, no need to swap validateSourceAmount(params.tradePath[0], params.srcAmount); destAmount = safeTransferWithFee( msg.sender, params.lendingContract, params.tradePath[0], params.srcAmount, // Not taking repay fee 0, params.platformWallet ); } else { destAmount = swapInternal( params.swapContract, params.srcAmount, actualPayAmount, params.tradePath, params.lendingContract, params.feeMode, params.feeBps, params.platformWallet, params.extraArgs ); } ILending(params.lendingContract).repayBorrowTo( msg.sender, IERC20Ext(params.tradePath[params.tradePath.length - 1]), destAmount, actualPayAmount, abi.encodePacked(params.rateMode) ); uint256 actualDebtPaid = debt.sub(ILending(params.lendingContract).getUserDebtCurrent(params.tradePath[params.tradePath.length - 1], msg.sender)); require(actualDebtPaid >= actualPayAmount, "low paid amount"); emit SwapAndRepay( msg.sender, params.swapContract, params.lendingContract, params.tradePath, params.srcAmount, destAmount, actualPayAmount, params.feeMode, params.feeBps, params.platformWallet ); } function swapInternal( address payable swapContract, uint256 srcAmount, uint256 minDestAmount, address[] calldata tradePath, address payable recipient, FeeMode feeMode, uint256 platformFee, address payable platformWallet, bytes calldata extraArgs ) internal returns (uint256 destAmount) { require(supportedSwaps.contains(swapContract), "unsupported swap"); require(tradePath.length >= 2, "invalid tradePath"); require(platformFee < BPS, "high platform fee"); validateSourceAmount(tradePath[0], srcAmount); uint256 actualSrcAmount = safeTransferWithFee( msg.sender, swapContract, tradePath[0], srcAmount, feeMode == FeeMode.FROM_SOURCE ? platformFee : 0, platformWallet ); { // to avoid stack too deep // who will receive the swapped token address _recipient = feeMode == FeeMode.FROM_DEST ? address(this) : recipient; destAmount = ISwap(swapContract).swap( ISwap.SwapParams({ srcAmount: actualSrcAmount, minDestAmount: minDestAmount, tradePath: tradePath, recipient: _recipient, feeBps: feeMode == FeeMode.BY_PROTOCOL ? platformFee : 0, feeReceiver: platformWallet, extraArgs: extraArgs }) ); } if (feeMode == FeeMode.FROM_DEST) { destAmount = safeTransferWithFee( address(this), recipient, tradePath[tradePath.length - 1], destAmount, platformFee, platformWallet ); } require(destAmount >= minDestAmount, "low return"); } function validateSourceAmount( address srcToken, uint256 srcAmount ) internal { if (srcToken == address(ETH_TOKEN_ADDRESS)) { require(msg.value == srcAmount, "wrong msg value"); } else { require(msg.value == 0, "bad msg value"); } } function transferToken( address payable to, IERC20Ext token, uint256 amount ) internal { if (amount == 0) return; if (token == ETH_TOKEN_ADDRESS) { (bool success, ) = to.call{value: amount}(""); require(success, "transfer failed"); } else { token.safeTransfer(to, amount); } } function safeTransferWithFee( address payable from, address payable to, address token, uint256 amount, uint256 platformFeeBps, address payable platformWallet ) internal returns (uint256 amountTransferred) { uint256 fee = amount.mul(platformFeeBps).div(BPS); uint256 amountAfterFee = amount.sub(fee); IERC20Ext tokenErc = IERC20Ext(token); if (tokenErc == ETH_TOKEN_ADDRESS) { (bool success, ) = to.call{value: amountAfterFee}(""); require(success, "transfer failed"); amountTransferred = amountAfterFee; } else { uint256 balanceBefore = tokenErc.balanceOf(to); if (from != address(this)) { // case transfer from another address, need to transfer fee to this proxy contract tokenErc.safeTransferFrom(from, to, amountAfterFee); tokenErc.safeTransferFrom(from, address(this), fee); } else { tokenErc.safeTransfer(to, amountAfterFee); } amountTransferred = tokenErc.balanceOf(to).sub(balanceBefore); } addFeeToPlatform(platformWallet, tokenErc, fee); } function addFeeToPlatform( address payable platformWallet, IERC20Ext token, uint256 amount ) internal { if (amount > 0) { require(supportedPlatformWallets.contains(platformWallet), "unsupported platform"); platformWalletFees[platformWallet][token] = platformWalletFees[platformWallet][token].add(amount); } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "./IERC20.sol"; import "../../math/SafeMath.sol"; import "../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } }
// SPDX-License-Identifier: MIT pragma solidity 0.7.6; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; /** * @dev Interface extending ERC20 standard to include decimals() as * it is optional in the OpenZeppelin IERC20 interface. */ interface IERC20Ext is IERC20 { /** * @dev This function is required as Kyber requires to interact * with token.decimals() with many of its operations. */ function decimals() external view returns (uint8 digits); }
pragma solidity 0.7.6; pragma abicoder v2; import "@kyber.network/utils-sc/contracts/IERC20Ext.sol"; interface ISmartWalletImplementation { enum FeeMode { FROM_SOURCE, FROM_DEST, BY_PROTOCOL } event Swap( address indexed trader, address indexed swapContract, address[] tradePath, uint256 srcAmount, uint256 destAmount, FeeMode feeMode, uint256 feeBps, address platformWallet ); event SwapAndDeposit( address indexed trader, address indexed swapContract, address indexed lendingContract, address[] tradePath, uint256 srcAmount, uint256 destAmount, FeeMode feeMode, uint256 feeBps, address platformWallet ); event WithdrawFromLending( address indexed trader, address indexed lendingContract, IERC20Ext token, uint256 amount, uint256 minReturn, uint256 actualReturnAmount ); event SwapAndRepay( address indexed trader, address indexed swapContract, address indexed lendingContract, address[] tradePath, uint256 srcAmount, uint256 destAmount, uint256 payAmount, FeeMode feeMode, uint256 feeBps, address platformWallet ); /// @param swapContract swap contract /// @param srcAmount amount of src token /// @param tradePath path of the trade on Uniswap /// @param platformFee fee if swapping feeMode = platformFee / BPS, feeBps = platformFee % BPS /// @param extraArgs extra data needed for swap on particular platforms struct GetExpectedReturnParams { address payable swapContract; uint256 srcAmount; address[] tradePath; FeeMode feeMode; uint256 feeBps; bytes extraArgs; } function getExpectedReturn(GetExpectedReturnParams calldata params) external view returns (uint256 destAmount, uint256 expectedRate); struct GetExpectedInParams { address payable swapContract; uint256 destAmount; address[] tradePath; FeeMode feeMode; uint256 feeBps; bytes extraArgs; } function getExpectedIn(GetExpectedInParams calldata params) external view returns (uint256 srcAmount, uint256 expectedRate); /// @param swapContract swap contract /// @param srcAmount amount of src token /// @param minDestAmount minimal accepted dest amount /// @param tradePath path of the trade on Uniswap /// @param feeMode fee mode /// @param feeBps fee bps /// @param platformWallet wallet to receive fee /// @param extraArgs extra data needed for swap on particular platforms struct SwapParams { address payable swapContract; uint256 srcAmount; uint256 minDestAmount; address[] tradePath; FeeMode feeMode; uint256 feeBps; address payable platformWallet; bytes extraArgs; } function swap(SwapParams calldata params) external payable returns (uint256 destAmount); /// @param swapContract swap contract /// @param lendingContract lending contract /// @param srcAmount amount of src token /// @param minDestAmount minimal accepted dest amount /// @param tradePath path of the trade on Uniswap /// @param feeMode fee mode /// @param feeBps fee bps /// @param platformWallet wallet to receive fee /// @param extraArgs extra data needed for swap on particular platforms struct SwapAndDepositParams { address payable swapContract; address payable lendingContract; uint256 srcAmount; uint256 minDestAmount; address[] tradePath; FeeMode feeMode; uint256 feeBps; address payable platformWallet; bytes extraArgs; } function swapAndDeposit(SwapAndDepositParams calldata params) external payable returns (uint256 destAmount); /// @param lendingContract lending contract to withdraw token /// @param token underlying token to withdraw, e.g ETH, USDT, DAI /// @param amount amount of cToken (COMPOUND) or aToken (AAVE) to withdraw /// @param minReturn minimum amount of underlying tokens to return struct WithdrawFromLendingPlatformParams { address payable lendingContract; IERC20Ext token; uint256 amount; uint256 minReturn; } function withdrawFromLendingPlatform(WithdrawFromLendingPlatformParams calldata params) external returns (uint256 returnedAmount); /// @param swapContract swap contract /// @param lendingContract lending contract /// @param srcAmount amount of src token /// @param payAmount: amount that user wants to pay, if the dest amount (after swap) is higher, /// the remain amount will be sent back to user's wallet /// @param tradePath path of the trade on Uniswap /// @param rateMode rate mode for aave v2 /// @param feeMode fee mode /// @param feeBps fee bps /// @param platformWallet wallet to receive fee /// @param extraArgs extra data needed for swap on particular platforms struct SwapAndRepayParams { address payable swapContract; address payable lendingContract; uint256 srcAmount; uint256 payAmount; address[] tradePath; uint256 rateMode; // for aave v2 FeeMode feeMode; uint256 feeBps; address payable platformWallet; bytes extraArgs; } function swapAndRepay(SwapAndRepayParams calldata params) external payable returns (uint256 destAmount); function claimPlatformFees(address[] calldata platformWallets, IERC20Ext[] calldata tokens) external; }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.7.6; import "@kyber.network/utils-sc/contracts/IERC20Ext.sol"; import "@kyber.network/utils-sc/contracts/Utils.sol"; import "@kyber.network/utils-sc/contracts/Withdrawable.sol"; import "@openzeppelin/contracts/utils/ReentrancyGuard.sol"; import "@openzeppelin/contracts/utils/EnumerableSet.sol"; contract SmartWalletStorage is Utils, Withdrawable, ReentrancyGuard { uint256 internal constant MAX_AMOUNT = type(uint256).max; mapping(address => mapping(IERC20Ext => uint256)) public platformWalletFees; EnumerableSet.AddressSet internal supportedPlatformWallets; EnumerableSet.AddressSet internal supportedSwaps; EnumerableSet.AddressSet internal supportedLendings; // [EIP-1967] bytes32(uint256(keccak256("SmartWalletImplementation")) - 1) bytes32 internal constant IMPLEMENTATION = 0x7cf58d76330f82325c2a503c72b55abca3eb533fadde43d95e3c0cceb1583e99; constructor(address _admin) Withdrawable(_admin) {} }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.7.6; pragma abicoder v2; interface ISwap { struct GetExpectedReturnParams { uint256 srcAmount; address[] tradePath; uint256 feeBps; bytes extraArgs; } function getExpectedReturn(GetExpectedReturnParams calldata params) external view returns (uint256 destAmount); struct GetExpectedInParams { uint256 destAmount; address[] tradePath; uint256 feeBps; bytes extraArgs; } function getExpectedIn(GetExpectedInParams calldata params) external view returns (uint256 srcAmount); struct SwapParams { uint256 srcAmount; // min return for uni, min conversionrate for kyber, etc. uint256 minDestAmount; address[] tradePath; address recipient; uint256 feeBps; address payable feeReceiver; bytes extraArgs; } function swap(SwapParams calldata params) external payable returns (uint256 destAmount); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.7.6; pragma experimental ABIEncoderV2; import "@kyber.network/utils-sc/contracts/IERC20Ext.sol"; interface ILending { function depositTo( address payable onBehalfOf, IERC20Ext token, uint256 amount ) external; function withdrawFrom( address payable onBehalfOf, IERC20Ext token, uint256 amount, uint256 minReturn ) external returns (uint256 returnedAmount); function repayBorrowTo( address payable onBehalfOf, IERC20Ext token, uint256 amount, uint256 payAmount, bytes calldata extraArgs // for extra data .i.e aave rateMode ) external; function getUserDebtCurrent(address _reserve, address _user) external returns (uint256 debt); function getLendingToken(IERC20Ext token) external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) return 0; uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: division by zero"); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); return a - b; } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.2 <0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity 0.7.6; import "./IERC20Ext.sol"; /** * @title Kyber utility file * mostly shared constants and rate calculation helpers * inherited by most of kyber contracts. * previous utils implementations are for previous solidity versions. */ abstract contract Utils { // Declared constants below to be used in tandem with // getDecimalsConstant(), for gas optimization purposes // which return decimals from a constant list of popular // tokens. IERC20Ext internal constant ETH_TOKEN_ADDRESS = IERC20Ext( 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE ); IERC20Ext internal constant USDT_TOKEN_ADDRESS = IERC20Ext( 0xdAC17F958D2ee523a2206206994597C13D831ec7 ); IERC20Ext internal constant DAI_TOKEN_ADDRESS = IERC20Ext( 0x6B175474E89094C44Da98b954EedeAC495271d0F ); IERC20Ext internal constant USDC_TOKEN_ADDRESS = IERC20Ext( 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 ); IERC20Ext internal constant WBTC_TOKEN_ADDRESS = IERC20Ext( 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599 ); IERC20Ext internal constant KNC_TOKEN_ADDRESS = IERC20Ext( 0xdd974D5C2e2928deA5F71b9825b8b646686BD200 ); uint256 public constant BPS = 10000; // Basic Price Steps. 1 step = 0.01% uint256 internal constant PRECISION = (10**18); uint256 internal constant MAX_QTY = (10**28); // 10B tokens uint256 internal constant MAX_RATE = (PRECISION * 10**7); // up to 10M tokens per eth uint256 internal constant MAX_DECIMALS = 18; uint256 internal constant ETH_DECIMALS = 18; uint256 internal constant MAX_ALLOWANCE = uint256(-1); // token.approve inifinite mapping(IERC20Ext => uint256) internal decimals; /// @dev Sets the decimals of a token to storage if not already set, and returns /// the decimals value of the token. Prefer using this function over /// getDecimals(), to avoid forgetting to set decimals in local storage. /// @param token The token type /// @return tokenDecimals The decimals of the token function getSetDecimals(IERC20Ext token) internal returns (uint256 tokenDecimals) { tokenDecimals = getDecimalsConstant(token); if (tokenDecimals > 0) return tokenDecimals; tokenDecimals = decimals[token]; if (tokenDecimals == 0) { tokenDecimals = token.decimals(); decimals[token] = tokenDecimals; } } /// @dev Get the balance of a user /// @param token The token type /// @param user The user's address /// @return The balance function getBalance(IERC20Ext token, address user) internal view returns (uint256) { if (token == ETH_TOKEN_ADDRESS) { return user.balance; } else { return token.balanceOf(user); } } /// @dev Get the decimals of a token, read from the constant list, storage, /// or from token.decimals(). Prefer using getSetDecimals when possible. /// @param token The token type /// @return tokenDecimals The decimals of the token function getDecimals(IERC20Ext token) internal view returns (uint256 tokenDecimals) { // return token decimals if has constant value tokenDecimals = getDecimalsConstant(token); if (tokenDecimals > 0) return tokenDecimals; // handle case where token decimals is not a declared decimal constant tokenDecimals = decimals[token]; // moreover, very possible that old tokens have decimals 0 // these tokens will just have higher gas fees. return (tokenDecimals > 0) ? tokenDecimals : token.decimals(); } function calcDestAmount( IERC20Ext src, IERC20Ext dest, uint256 srcAmount, uint256 rate ) internal view returns (uint256) { return calcDstQty(srcAmount, getDecimals(src), getDecimals(dest), rate); } function calcSrcAmount( IERC20Ext src, IERC20Ext dest, uint256 destAmount, uint256 rate ) internal view returns (uint256) { return calcSrcQty(destAmount, getDecimals(src), getDecimals(dest), rate); } function calcDstQty( uint256 srcQty, uint256 srcDecimals, uint256 dstDecimals, uint256 rate ) internal pure returns (uint256) { require(srcQty <= MAX_QTY, "srcQty > MAX_QTY"); require(rate <= MAX_RATE, "rate > MAX_RATE"); if (dstDecimals >= srcDecimals) { require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS"); return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION; } else { require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS"); return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals))); } } function calcSrcQty( uint256 dstQty, uint256 srcDecimals, uint256 dstDecimals, uint256 rate ) internal pure returns (uint256) { require(dstQty <= MAX_QTY, "dstQty > MAX_QTY"); require(rate <= MAX_RATE, "rate > MAX_RATE"); //source quantity is rounded up. to avoid dest quantity being too low. uint256 numerator; uint256 denominator; if (srcDecimals >= dstDecimals) { require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS"); numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals))); denominator = rate; } else { require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS"); numerator = (PRECISION * dstQty); denominator = (rate * (10**(dstDecimals - srcDecimals))); } return (numerator + denominator - 1) / denominator; //avoid rounding down errors } function calcRateFromQty( uint256 srcAmount, uint256 destAmount, uint256 srcDecimals, uint256 dstDecimals ) internal pure returns (uint256) { require(srcAmount <= MAX_QTY, "srcAmount > MAX_QTY"); require(destAmount <= MAX_QTY, "destAmount > MAX_QTY"); if (dstDecimals >= srcDecimals) { require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS"); return ((destAmount * PRECISION) / ((10**(dstDecimals - srcDecimals)) * srcAmount)); } else { require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS"); return ((destAmount * PRECISION * (10**(srcDecimals - dstDecimals))) / srcAmount); } } /// @dev save storage access by declaring token decimal constants /// @param token The token type /// @return token decimals function getDecimalsConstant(IERC20Ext token) internal pure returns (uint256) { if (token == ETH_TOKEN_ADDRESS) { return ETH_DECIMALS; } else if (token == USDT_TOKEN_ADDRESS) { return 6; } else if (token == DAI_TOKEN_ADDRESS) { return 18; } else if (token == USDC_TOKEN_ADDRESS) { return 6; } else if (token == WBTC_TOKEN_ADDRESS) { return 8; } else if (token == KNC_TOKEN_ADDRESS) { return 18; } else { return 0; } } function minOf(uint256 x, uint256 y) internal pure returns (uint256) { return x > y ? y : x; } }
// SPDX-License-Identifier: MIT pragma solidity 0.7.6; import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol"; import "./IERC20Ext.sol"; import "./PermissionAdmin.sol"; abstract contract Withdrawable is PermissionAdmin { using SafeERC20 for IERC20Ext; event TokenWithdraw(IERC20Ext token, uint256 amount, address sendTo); event EtherWithdraw(uint256 amount, address sendTo); constructor(address _admin) PermissionAdmin(_admin) {} /** * @dev Withdraw all IERC20Ext compatible tokens * @param token IERC20Ext The address of the token contract */ function withdrawToken( IERC20Ext token, uint256 amount, address sendTo ) external onlyAdmin { token.safeTransfer(sendTo, amount); emit TokenWithdraw(token, amount, sendTo); } /** * @dev Withdraw Ethers */ function withdrawEther(uint256 amount, address payable sendTo) external onlyAdmin { (bool success, ) = sendTo.call{value: amount}(""); require(success, "withdraw failed"); emit EtherWithdraw(amount, sendTo); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () internal { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT pragma solidity 0.7.6; abstract contract PermissionAdmin { address public admin; address public pendingAdmin; event AdminClaimed(address newAdmin, address previousAdmin); event TransferAdminPending(address pendingAdmin); constructor(address _admin) { require(_admin != address(0), "admin 0"); admin = _admin; } modifier onlyAdmin() { require(msg.sender == admin, "only admin"); _; } /** * @dev Allows the current admin to set the pendingAdmin address. * @param newAdmin The address to transfer ownership to. */ function transferAdmin(address newAdmin) public onlyAdmin { require(newAdmin != address(0), "new admin 0"); emit TransferAdminPending(newAdmin); pendingAdmin = newAdmin; } /** * @dev Allows the current admin to set the admin in one tx. Useful initial deployment. * @param newAdmin The address to transfer ownership to. */ function transferAdminQuickly(address newAdmin) public onlyAdmin { require(newAdmin != address(0), "admin 0"); emit TransferAdminPending(newAdmin); emit AdminClaimed(newAdmin, admin); admin = newAdmin; } /** * @dev Allows the pendingAdmin address to finalize the change admin process. */ function claimAdmin() public { require(pendingAdmin == msg.sender, "not pending"); emit AdminClaimed(pendingAdmin, admin); admin = pendingAdmin; pendingAdmin = address(0); } }
{ "optimizer": { "enabled": true, "runs": 780 }, "metadata": { "bytecodeHash": "none" }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "libraries": {} }
Contract Security Audit
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IERC20Ext[]","name":"tokens","type":"address[]"},{"indexed":false,"internalType":"address","name":"claimer","type":"address"}],"name":"ClaimedPlatformFees","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"sendTo","type":"address"}],"name":"EtherWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"trader","type":"address"},{"indexed":true,"internalType":"address","name":"swapContract","type":"address"},{"indexed":false,"internalType":"address[]","name":"tradePath","type":"address[]"},{"indexed":false,"internalType":"uint256","name":"srcAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"destAmount","type":"uint256"},{"indexed":false,"internalType":"enum ISmartWalletImplementation.FeeMode","name":"feeMode","type":"uint8"},{"indexed":false,"internalType":"uint256","name":"feeBps","type":"uint256"},{"indexed":false,"internalType":"address","name":"platformWallet","type":"address"}],"name":"Swap","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"trader","type":"address"},{"indexed":true,"internalType":"address","name":"swapContract","type":"address"},{"indexed":true,"internalType":"address","name":"lendingContract","type":"address"},{"indexed":false,"internalType":"address[]","name":"tradePath","type":"address[]"},{"indexed":false,"internalType":"uint256","name":"srcAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"destAmount","type":"uint256"},{"indexed":false,"internalType":"enum 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IERC20Ext","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"minReturn","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"actualReturnAmount","type":"uint256"}],"name":"WithdrawFromLending","type":"event"},{"inputs":[],"name":"BPS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20Ext[]","name":"tokens","type":"address[]"},{"internalType":"address[]","name":"spenders","type":"address[]"},{"internalType":"bool","name":"isReset","type":"bool"}],"name":"approveAllowances","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"platformWallets","type":"address[]"},{"internalType":"contract IERC20Ext[]","name":"tokens","type":"address[]"}],"name":"claimPlatformFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address payable","name":"swapContract","type":"address"},{"internalType":"uint256","name":"destAmount","type":"uint256"},{"internalType":"address[]","name":"tradePath","type":"address[]"},{"internalType":"enum ISmartWalletImplementation.FeeMode","name":"feeMode","type":"uint8"},{"internalType":"uint256","name":"feeBps","type":"uint256"},{"internalType":"bytes","name":"extraArgs","type":"bytes"}],"internalType":"struct ISmartWalletImplementation.GetExpectedInParams","name":"params","type":"tuple"}],"name":"getExpectedIn","outputs":[{"internalType":"uint256","name":"srcAmount","type":"uint256"},{"internalType":"uint256","name":"expectedRate","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address payable","name":"swapContract","type":"address"},{"internalType":"uint256","name":"srcAmount","type":"uint256"},{"internalType":"address[]","name":"tradePath","type":"address[]"},{"internalType":"enum ISmartWalletImplementation.FeeMode","name":"feeMode","type":"uint8"},{"internalType":"uint256","name":"feeBps","type":"uint256"},{"internalType":"bytes","name":"extraArgs","type":"bytes"}],"internalType":"struct ISmartWalletImplementation.GetExpectedReturnParams","name":"params","type":"tuple"}],"name":"getExpectedReturn","outputs":[{"internalType":"uint256","name":"destAmount","type":"uint256"},{"internalType":"uint256","name":"expectedRate","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingAdmin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"contract IERC20Ext","name":"","type":"address"}],"name":"platformWalletFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address 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payable","name":"lendingContract","type":"address"},{"internalType":"uint256","name":"srcAmount","type":"uint256"},{"internalType":"uint256","name":"minDestAmount","type":"uint256"},{"internalType":"address[]","name":"tradePath","type":"address[]"},{"internalType":"enum ISmartWalletImplementation.FeeMode","name":"feeMode","type":"uint8"},{"internalType":"uint256","name":"feeBps","type":"uint256"},{"internalType":"address payable","name":"platformWallet","type":"address"},{"internalType":"bytes","name":"extraArgs","type":"bytes"}],"internalType":"struct ISmartWalletImplementation.SwapAndDepositParams","name":"params","type":"tuple"}],"name":"swapAndDeposit","outputs":[{"internalType":"uint256","name":"destAmount","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address payable","name":"swapContract","type":"address"},{"internalType":"address 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ISmartWalletImplementation.SwapAndRepayParams","name":"params","type":"tuple"}],"name":"swapAndRepay","outputs":[{"internalType":"uint256","name":"destAmount","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"transferAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"transferAdminQuickly","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address payable","name":"sendTo","type":"address"}],"name":"withdrawEther","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address payable","name":"lendingContract","type":"address"},{"internalType":"contract IERC20Ext","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"minReturn","type":"uint256"}],"internalType":"struct ISmartWalletImplementation.WithdrawFromLendingPlatformParams","name":"params","type":"tuple"}],"name":"withdrawFromLendingPlatform","outputs":[{"internalType":"uint256","name":"returnedAmount","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20Ext","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"sendTo","type":"address"}],"name":"withdrawToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000a3e78ab6f120c730d6f3939c0dc6dcd0e3da7278
-----Decoded View---------------
Arg [0] : _admin (address): 0xa3e78aB6f120C730D6F3939c0Dc6dcD0E3da7278
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000a3e78ab6f120c730d6f3939c0dc6dcd0e3da7278
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.